are collagen peptides worth it？

Scientifically speaking, yes, they are absolutely worth it—provided you are using high-quality, hydrolyzed peptides. The clinical efficacy is well-documented. There are numerous double-blind, placebo-controlled studies showing that a daily dose of 5g to 10g significantly improves skin elasticity and reduces joint pain. From an evidence-based standpoint, it’s one of the few functional ingredients where the science actually matches the hype.